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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_001_323">&nbsp;</a>NAME</h4><blockquote>
btowc - single-byte to wide-character conversion
</blockquote><h4><a name = "tag_000_001_324">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="stdio.h.html">stdio.h</a>&gt;
#include &lt;<a href="wchar.h.html">wchar.h</a>&gt;

wint_t btowc(int <i>c</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_001_325">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>btowc()</i>
function determines whether
<i>c</i>
constitutes a valid (one-byte) character in the initial
shift state.
<p>
The behaviour of this function is affected by the LC_CTYPE category of
the current locale.
</blockquote><h4><a name = "tag_000_001_326">&nbsp;</a>RETURN VALUE</h4><blockquote>
The
<i>btowc()</i>
function returns WEOF if
<i>c</i>
has the value EOF or if 
<b>(unsigned char)</b>
<i>c</i>
does not constitute a valid (one-byte) character in the
initial shift state.  Otherwise, it returns the wide-character
representation of that character.
</blockquote><h4><a name = "tag_000_001_327">&nbsp;</a>ERRORS</h4><blockquote>
No errors are defined.
</blockquote><h4><a name = "tag_000_001_328">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_001_329">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_001_330">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_001_331">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="wctob.html">wctob()</a></i>,
<i><a href="wchar.h.html">&lt;wchar.h&gt;</a></i>.
</blockquote><h4>DERIVATION</h4><blockquote>
Derived from the ISO/IEC 9899:1990/Amendment 1:1995 (E).
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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